Xi'an has a warm temperate semi-humid continental monsoon climate, exhibiting four distinct seasons and moderate precipitation. The winter of Xi'an is chilly and foggy, with light winds and little rain and snow. Spring is warm, dry, windy, and volatile. Summer is hot, rainy, often associated with thunderstorms and heavy winds, and drought is prominent in midsummer. It is cool in autumn with apparent drop in temperature. The annual temperature is about 15 C. The average temperature of the coolest month (January) is around 0 C, while that of the warmest month (July) is 26 C. The annual precipitation is 500 - 750 mm, which mainly occurs in summer and autumn. Xi'an has 1,500 hours of sunshine and 208 - 230 days free of frost per year. Northeasterly wind is the most frequent wind direction in a year.

Pressure

monthly mean atmospheric pressure

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Pressure(hPa)

9798

9768

9728

9679

9647

9600

9580

9613

9686

9747

9787

9807

Pressure (hPa)

9798

9768

9728

9679

9647

9600

9580

9613

9686

9747

9787

9807

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.1 monthly mean pressure

Temperature

monthly mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Temp(oF)

31.8

37.2

46.5

58.6

67.6

76.6

79.8

77.5

67.8

57

44.4

34.3

Temp(oC)

-.1

2.9

8.1

14.8

19.8

24.8

26.6

25.3

19.9

13.9

6.9

1.3

Temperature (oC|oF)

-.1 oC 31.8 oF

2.9 oC 37.2 oF

8.1 oC 46.5 oF

14.8 oC 58.6 oF

19.8 oC 67.6 oF

24.8 oC 76.6 oF

26.6 oC 79.8 oF

25.3 oC 77.5 oF

19.9 oC 67.8 oF

13.9 oC 57 oF

6.9 oC 44.4 oF

1.3 oC 34.3 oF

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.2 monthly mean temperature

monthly extreme mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

25.1

30

38.4

49.1

57.5

66.5

71.4

69.6

60.6

49.8

37.2

27.5

Min Temp (oC)

-3.8

-1.1

3.6

9.5

14.2

19.2

21.9

20.9

15.9

9.9

2.9

-2.5

Max Temp (oF)

40.6

46.9

57

69.8

78.9

88.1

89.7

87.4

77.5

67.1

53.9

43.5

Max Temp(oC)

4.8

8.3

13.9

21

26.1

31.2

32.1

30.8

25.3

19.5

12.2

6.4

monthly extreme daily temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

3.2

11.6

20.1

29.6

39.2

50.1

59.3

54.5

43.8

28.5

10.4

5.5

Min Temp (oC)

-16

-11.3

-6.6

-1.3

4

10.1

15.2

12.5

6.6

-1.9

-12

-14.7

Max Temp (oF)

62.6

75.3

82

92.4

101.4

107.2

104.5

104

100.7

92.6

75.3

70.8

Max Temp (oC)

17

24.1

27.8

33.6

38.6

41.8

40.3

40

38.2

33.7

24.1

21.6

Humidity

monthly mean hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity (%)

66

63

67

68

68

62

71

75

79

77

74

69

Hunidity (%)

66

63

67

68

68

62

71

75

79

77

74

69

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.3 monthly mean hunidity

monthly minimum daily hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity(%)

8

3

3

6

9

8

16

21

16

13

9

10

Precipitation

monthly mean precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

6.9

9.6

28.6

43

60.2

54.4

98.6

70.8

91.6

59.9

23.9

5.8

Days (Precipitation<0.1mm)

3.6

4.4

6.9

8.4

8.9

9

10

9.1

10.9

9.7

6

3.4

Days (Precipitation<10mm)

0

.2

1

1.5

2.2

1.9

3

2.5

3.1

2.2

.5

0

Days (Precipitation<25mm)

0

0

0

.2

.4

.4

1.2

.6

.9

.4

.1

0

Days (Precipitation<50mm)

0

0

0

0

.1

0

.3

.1

.1

0

0

0

Precipitation (mm)

6.9

9.6

28.6

43

60.2

54.4

98.6

70.8

91.6

59.9

23.9

5.8

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.4 monthly mean precipitation

monthly maximum daily precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

11.9

20.8

81

31.3

55.8

47.4

110.7

69.9

92.5

47.1

32.3

15.3

Wind

monthly mean wind speed

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed(m/s)

1.3

1.6

1.9

1.8

1.8

1.9

1.9

1.8

1.4

1.4

1.4

1.3

Wind Speed (m/s)

1.3

1.6

1.9

1.8

1.8

1.9

1.9

1.8

1.4

1.4

1.4

1.3

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean wind speed

monthly maximum daily
wind speed and direction

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed (m/s)

10.1

11.7

12

15

15

15

15.2

15.2

13

13.7

12

11.6

Sunshine

monthly mean sunshine duration

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Duration (hour)

100.8

103.2

120.8

147.9

171.4

185.3

191.9

195.4

127

111.1

98.4

92.8

Duration (hour)

100.8

103.2

120.8

147.9

171.4

185.3

191.9

195.4

127

111.1

98.4

92.8

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean sunshine duration

monthly sunshine percentage

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Percentage (%)

32

34

33

38

40

43

44

47

34

32

32

31

Remarks:
Weather forecast is provided by China Meteorological Administration.
Climate information is based on monthly averages for 30-year period of 1971-2000.
Precipitation includes both rain and snow.